OBO Blick 1/2002 - New harvest 2002 - OBO Bettermann

T B Sgreat advantage where compactEMC concepts are concerned. Inaddition, the separate NPE sparkgap at the surge arrester (requirementclass C) with compact TTand TN-S systems can be omitted.Preferred fields of application forthe new OBO devices are compactsurge protection concepts in separatehousings and the installation ofarresters of requirement classes Band C in a distribution board. Typicalapplications: Compact mobileradio transmittersThe advantages at a glance: Low protection level < 1.3 kV No need for a decoupling inductance or a length of conductorbetween arresters of requirementclasses B and C. Up to 45 percent space savingwith compact EMC concepts. Proven multi-carbon technologyin the LightningControllers .Surges don’tstand a chance:New protectiondevices for mobilesystems anddirectionalradio linksA new coaxial surge protectionadapter for mobile systems anddirectional radio links has beenadded to OBO’s TBS range. Thenew adapter has a 7/16 male connector(DIN) and is designed for thefrequency ranges 800 to 900 MHz(type LP 7/16-850 MF-C) or 1700to 1900 MHz (type LP 7/16-1800MF-C).The new surge arresters act as narrow-bandfilters. Only a narrow rangeof frequencies is passed by thedevices; other frequencies areshort-circuited and diverted. Withsurge arresters of this design, adirect short circuit is establishedbetween the inner and outer conductors.This short circuit takes theform of a coaxial line of preciselydefined length, an electrical wavelengthof one-quarter of the wavelength(l/4) of the frequency to betransmitted.surement and control engineeringsectors.Basic and precision protectiondevices with OBO LSA-PLUS technologyare fitted with fail-safe technology,which bridges the arresterin the event of a thermal overload,thus protecting it.Simply by mounting the LSA-PRO-FIL connection or isolator strip onthe PROFIL mounting tray, the surgearresters can be mounted onalmost any wall. The LSA-Plus simplewiring tool is all you need toinstall the wires without cutters,solder, screws or stripping. No sensitive trigger electronicsinside the lightning arresters. With compact TT and TN-Ssystems there is no need for theadditional NPE sum spark gapwith surge arresters of requirementclass C.The technology of the devices inoutline:MCD 50-B:The specially doped insulatingrings, which determine the preciselydefined spacing of the nine sparkgaps, guarantee the low protectionlevel (Up) < 1.3 kV. As with the provenMC 50-B/VDE, the modulararrester makes it possible to removethe upper part without interruptingthe mains voltage, in order tomeasure the insulation resistance inaccordance with TAB2000.MCD 125-B/NPE:The type MCD 125-B/NPE versionis an NPE spark gap intended tobe installed between the neutralconductor (N) and the protectiveearth conductor (PE). The low protectionlevel (< 1.3 kV) is achievedby a specially coordinated protectioncircuit.OBOBlick 1/2002 | 17